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46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#ifndef GRID_LATTICE_REDUCTION_H
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#define GRID_LATTICE_REDUCTION_H
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namespace Grid {
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Reduction operations
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class vobj>
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inline RealD norm2(const Lattice<vobj> &arg){
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typedef typename vobj::scalar_type scalar;
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typedef typename vobj::vector_type vector;
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decltype(innerProduct(arg._odata[0],arg._odata[0])) vnrm=zero;
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scalar nrm;
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//FIXME make this loop parallelisable
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vnrm=zero;
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for(int ss=0;ss<arg._grid->oSites(); ss++){
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vnrm = vnrm + innerProduct(arg._odata[ss],arg._odata[ss]);
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}
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vector vvnrm =TensorRemove(vnrm) ;
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nrm = Reduce(vvnrm);
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arg._grid->GlobalSum(nrm);
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return real(nrm);
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}
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template<class vobj>
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inline auto innerProduct(const Lattice<vobj> &left,const Lattice<vobj> &right) ->decltype(innerProduct(left._odata[0],right._odata[0]))
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{
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typedef typename vobj::scalar_type scalar;
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decltype(innerProduct(left._odata[0],right._odata[0])) vnrm=zero;
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scalar nrm;
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//FIXME make this loop parallelisable
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for(int ss=0;ss<left._grid->oSites(); ss++){
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vnrm = vnrm + innerProduct(left._odata[ss],right._odata[ss]);
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}
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nrm = Reduce(vnrm);
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right._grid->GlobalSum(nrm);
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return nrm;
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}
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}
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#endif
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